While doing a vol2 lab I got stumped by one of the tasks in the lab. The task was to filter ICMP packets coming from the backbone destined to a network on the internal routers. The topology looks like this.
Drastically decreasing CPU load in Dynamips
Running Dynamips takes a lot of CPU and memory and running a full CCIE topology on a Windows machine can be tough. I do a lot of studying on my commute to my job and I run some smaller labs
IPv6 over frame relay
This post will look at IPv6 over frame-relay and describe some of the small things that differ compared to IPv4 and some gotchas. We start out with the same topology as in my previous frame-relay post. We configure routers R1,
First troubleshooting session done
I did my first troubleshooting session tonight. I was worried about only having 2 hours alotted but time was the least of my concerns. I finished at 70 minutes so almost an hour to spare. I did quite OK, 60%
Creating an IOS menu
I did some labbing yesterday and I got a task that said I should create an IOS menu for NOC users so that they can ping and traceroute without needing to know the CLI. I had never used this feature
Flash cards updated
The flash cards have been updated. There is now a total of 222 flash cards. Download it as usual from here.
Understanding frame-relay
This post is about frame-relay. Knowing frame-relay is core knowledge for the CCIE exam. We need to have our layer 2 functioning to be able to move on to routing and other tasks. While I do have an OK understanding
Don’t forget ip routing on switches
Yesterday I did a vol3 lab and one of the tasks was to enable EIGRP on a couple of the switches. I had enabled EIGRP, however I was not getting any routes installed in the routing table. Look at the
Reflexive access-lists
Reflexive access-lists is a way of filtering traffic where only return traffic is allowed if it belongs to a session initiated on the “inside”. In a regular access-list we can use the keyword established for filtering but that only looks
Conditional BGP, showing status
This is some notes for the post that I did on conditional BGP advertisement. I found an easier way of seeing the status for the advertise-map. It is available by looking at the neighbor status, look at the following output.